The Collaborative International Dictionary
Catanadromous
Catanadromous \Cat"a*nad`ro*mous\, a. [Gr. kata` down + 'ana` up + dro`mos running, course.] (Zo["o]l.) Ascending and descending fresh streams from and to the sea, as the salmon; anadromous. [R.]
Wiktionary
catanadromous
a. (context zoology English) ascend and descending freshwater streams from and to the sea, as the salmon does; anadromous.